NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 617
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 34
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-01-22 617-741-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-07-27 617-533-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F DORCHESTER MA
2020-07-27 617-751-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2020-07-27 617-819-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHELSEA MA
2020-04-28 617-741-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2020-03-16 617-765-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2019-02-04 617-404-2XXX 2000–2999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2018-11-14 617-420-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EVERETT MA
2018-10-01 617-404-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2018-10-01 617-752-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2015-11-06 617-315-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2015-10-14 617-315-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2015-04-30 617-207-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2013-09-19 617-337-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHARLESTN MA
2013-09-19 617-581-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F NEWTON MA
2013-04-08 617-207-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2013-04-08 617-841-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2013-04-05 617-993-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2013-04-05 617-993-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2012-04-16 617-322-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F MILTON MA
2012-04-03 617-297-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F DORCHESTER MA
2012-04-03 617-702-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SOMERVILLE MA
2011-10-03 617-766-3XXX 3000–3999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F SO BOSTON MA
2011-06-17 617-286-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHARLESTN MA
2011-06-17 617-370-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CHELSEA MA
2011-06-17 617-410-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EVERETT MA
2011-06-17 617-639-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2011-06-17 617-651-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2011-06-17 617-987-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON MA
2011-06-13 617-639-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2010-07-26 617-841-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2009-09-25 617-313-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F MILTON MA
2002-05-29 617-329-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2002-05-29 617-455-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F EASTBOSTON MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.